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moray james

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About moray james

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  1. I wanted to know when voicing changed from using tube amps to Solid State amplifiers. My guess is around 1985 when the H2 came out but what about the Cornwall LaScala and KHorn? Thanks for the help in advance. a tube output (a transformer) is electrically different from a solid state output (transistor or mosfet) so when voicing the loudspeaker different eq is used. I do not want to make this a discussion about voicing or SS Vs tube amplifiers. I know that the late Heresy (by about 1982 on) were voiced for SS I don't now about the CW, LS and KH though. Perhaps the Chief would chime in and comment. For those who wish to discuss voicing and amplifier types do not discuss this here, please start a thread of your own for that. Here I only wish to learn when the change was made for the various models in the Heritage line. Thank you for your cooperation.
  2. the tuning frequency is around 36 Hz so with room gain it has reasonable output at 34 Hz and below though it is rolled off compared to say 40 Hz. response. Where the woofer is does not make a lot of difference as it is not the woofer which is making the bass the passive takes care of the bass. Rise the speaker up and some of the bass wave wraps around the cabinet to cancel out rather than being reflected forward off of the floor or baffle. For this reason wide baffles are preferred to assist in launching the bass wavefront to a lower frequency.
  3. flatten your boxes and keep them you will not regret it.
  4. what is the length of lets say 34 Hz? you are suggesting that raising a Forte up 14" off the floor is going to mess with the coupling of such a long wave? In a speaker baffle so long as drivers are within 1/4 wave there is no real issue. I think the stand is not going to pose a problem.
  5. I hear you and I agree, I could make that evaluation also but lots of folks need the direct comparison and it won't be hard to find a home for either loudspeaker once a decision has been made one way or the other. There should be no reason for this to cost the op a dime as both models are in demand on the used market.
  6. good idea to pick up a pair of Chorus and compare them directly to your Forte 2 then sell the pair you like the least.
  7. The layout of the Crites will provide a small improvement in performance. Perhaps you can ask for a demonstration? What you will hear will depend upon both you and the resolution of your system, it won't be a big difference but there will be a difference you are probably good with the fresh caps installed and only you can answer your question.
  8. Thanks Edgar: is there any record of products that Don was responsible for? I know he took a look at the Cornwall and told PWK that it was pretty much done like dinner and to leave well enough alone it was not broken and did not need fixing.
  9. probably to maintain the sonic character of the loudspeaker. I found when switching from phenolic to titanium I had to re voice my Heresy and other models (forte forte 3 KLF20)I damp the horn bodies with dynamat alongwith the horn driver assemblie inside and out installing dynamat on the pole piece and including an F-11 acoustical felt dome beneath the diaphragm and also dynamat (or Hushmat) on the terminal tab of the tweeter which really rings. this results in a very much smoother and warmer sound. Difference is dramatic and I would not listen to non modified drivers any more.
  10. the Bob Crites CT125 tweeter is a phenolic diaphragm plug in upgrade/replacement for the K77 better high end extension smoother across the band, you can install the horn from the front and then mount the driver to the rear, same size horn and performance. I installed a pair into my Heresy and was very pleased with the sound improvement.
  11. Don Keele also worked for PWK for a while, I am not sure just how long for but I am going to guess around a year, perhaps someone in the know will provide more accurate information.
  12. what size throat is your F3 mid horn? can you take a look and see what the diaphragm material is? The CW4 is a polyamide diaphragm given the issues with the sound of ti especially in the mid and the fact that Klipsch used a plastic mid diaphragm in thCW4 I would imagine they would also use a plastic mid in the F3 would make sense anyway. Perhaps some much more knowledgeable person than myself can tell us with certainty the diaphragm material of both drives (F3 and CW4) along with the diaphragm diametre and the driver exit diametre?
  13. so far as I can tell the motor on a K76 tweeter and the motor on a K107 tweeter are the same the diaphragms are the same size but different materials K76 is phenolic the K107 is titanium. I own both, the horns are different the horn on the K76 is an exponential the horn on the K107 is a tractrix. So far as I can tell with mine which both have titanium diaphragms installed the difference I hear is in dispersion. You are looking at diaphragm material differences in the mid drivers as well and probably diaphragm size differences as well. The mid horns are radically different K700/701 is a very old design and it is a small exponential model the mid horn in the Forte 3 is a tractrix and is very much larger and had much better polar control and to lower frequencies and I will assume considerably wider range both down and up, distortion overall will be much improved with the newer horn. I don't put much stock in reviews they really depend upon the reviewer I like to listen for myself but I do trust what Roy says. I don't know a whole lot about the Forte 3 woofer it may be different from either Forte I assume that it is. I also assume it will be more similar than different. Further if the diaphragm of the Forte 3 mid driver is larger then it will have measurably lower distortion at all levels. Roy designed the Forte 2 Roy designed the Forte 3 I believe that the Forte 3 will be a much better loudspeaker than the Forte 2. Having owned Heresy built in the last couple of months prior to H2 and then having two sets of H3 I know what kind of a performance jump the H3 crossover brought to the Heresy 3 and would expect a similar jump in the Forte 3. These are my thoughts and opinions. When you say you think the F3 sounds hollow and harsh compared to H2 I have no way to know what you are hearing there are so many variables. I will say that a H2 stock uses phenolic mid and tweeter diaphragms the F3 uses I believe a poly mid diaphragm (possibly Kapton ) and a titanium tweeter. I will say that some people (and this is a fairly small percentage) are bothered by the fundamental structural resonance of titanium diaphragms and they cannot listen to them for very long. It is entirely possible you belong to that group. Phenolic diaphragms are smooth soft and round sounding very relaxed and easy to listen to. There are a lot of reasons you like and dislike what you do but as I said the horns are not of poorer quality and aside for the comment that I made about some not being able to listen to titanium neither are the drivers. In the end it all comes down to what you like even it what you like is more distortion (which is something which has been studied) well that is what you like so what enjoy what you like search it out and enjoy it!
  14. looks like a layer of veneer the base cabinet material is likely plywood.
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